<div class="{{prefixCls}}-content">
  <ng-container *ngIf="!isTemplateRef(content);else contentTemplate">{{content}}</ng-container>
</div>
<div *ngIf="extra" class="{{prefixCls}}-extra">
  <ng-container *ngIf="!isTemplateRef(extra);else extraTemplate">{{extra}}</ng-container>
</div>
<ng-template #contentTemplate>
  <ng-template [ngTemplateOutlet]="content"></ng-template>
</ng-template>
<ng-template #extraTemplate>
  <ng-template [ngTemplateOutlet]="extra"></ng-template>
</ng-template>